diff --git a/src/main.rs b/src/main.rs
index e30d512..193aaff 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -44,7 +44,7 @@ pub struct Cli {
     pub config: Option<PathBuf>,
 
     /// Image names to ignore tag differences.
-    #[arg(long)]
+    #[arg(long, value_delimiter = ',')]
     pub ignore_tag_images: Vec<String>,
 
     #[clap(flatten)]